Click on the button above to hear Ella Fitzgerald sing “Mack the Knife.” It’s a wonderful performance recorded live in Berlin in 1960. Halfway through the song, Ella forgets the words — her improvisation works well, particularly since the audience likely speaks German. She refers to the previous versions of “Mack the Knife” by Louis Armstrong (1956) and Bobby Darren (1959) and comes up with some other off-the-cuff lines — and, of course, everything rhymes. She even manages to mimic the the sound of the great Satchmo. Enjoy!